杂交茎瘤芥需肥规律研究

Research of the Fertilizer Demand Rule of Hybrid Tumour Stem Mustard

用分期取样、化验分析、模型拟合的方法,研究了杂交茎瘤芥干物质积累过程以及生长过程中对氮、磷、钾三大元素的吸收规律。结果表明,杂交茎瘤芥干物质积累和对氮、磷、钾的吸收均符合Logistic生长曲线。以茎瘤芥对养分的吸收规律为依据,研究其需肥特性,结果表明,杂交茎瘤芥目标产量若为3500kg/667m2,需纯氮33.56kg、磷(P2O5)7.63kg、钾(K2O)25.47kg,其比例为1∶0.23∶0.76。

Accumulation process of dry material of hybrid tumour stem mustard as well as the three big elements absorption rule of nitrogen, phosphorus and potassium during the growth were studied, by means of sampling at given stages, the chemical analysis and the model fitting method. The results indicated that the dry material accumulation of hybrid tumour stem mustard and the absorption of the nitrogen, the phosphorus and the potassium conform to the logistic growth curve. According to the nutrient absorption rule of the tumour stem mustard, the requirement of fertilizer was studied. The results showed that if the goal output of hybrid tumore stem mustard is 3 500 kg/667 m^2, pure nitrogen demanded is 33.56 kg, the phosphorus （P2O5） is 7.63 kg, the potassium （K2O） is 25.47 kg, its proportion is 1：0.23：0.76.